What are the major assessments under the Income-tax Law?

Under the Income-tax Law, there are four major assessments as given below:

1. Section 143(1), i.e., Summary assessment without calling the assessee i.e. taxpayer.
2. Assessment under section 143(3), i.e., Scrutiny assessment.
3. Assessment under section 144, i.e., Best judgment assessment.
4. Assessment under section 147​, i.e., Income escaping assessment.​